Using laser welding for joining thermoplastics is an industrially established process. The advantages of this process are, among other things, high automation and flexibility, no sputtering from melt ejection and vibration-free production. At the Laser Zentrum Hannover e.V. (LZH), this technology has been further developed to join thermoplastic polymers to wood materials.
This process can be used for joining common thermoplastics such as PP, PA and ABS to wood materials, such as fibreboard (MDF, HDF), chipboard or solid wood boarding. Bonding to wood fibreboards and natural fiber composite material boards was also investigated, for applications in the automotive industry. Depending on the materials to be joined, different joining mechanisms were investigated, in which the natural thermoplastic lignin, a main element of wood, appears to play an important role.
Apart from the advantages mentioned above, laser welding can also be used to join wood materials without using glues. Costs related to the glue itself, and to maintenance and cleaning costs connected to glue application are no longer applicable.
Tensile shear tests and impermeability tests have shown that laser bonding is qualitatively good, and on approximately the same level as competitive bonding processes.
The LZH can transfer experimental results from plastic-wood bonding to real workpieces. Also, further development of the process is possible, for example for adaptation to customer-specific materials and peripheral conditions.
Michael Botts | idw
Further reports about: > Bonding technical Polymers and Wood Materials > LZH > Laser Welding > Polymer > Thermoplastics > automotive industry > chipboard > fibreboard > laser system > melt ejection > natural thermoplastic lignin > plastic-wood bonding > solid wood boarding > vibration-free production
Dresdner scientists print tomorrow’s world
08.02.2017 | Fraunhofer-Institut für Werkstoff- und Strahltechnik IWS
New technology for mass-production of complex molded composite components
23.01.2017 | Evonik Industries AG
Cells need to repair damaged DNA in our genes to prevent the development of cancer and other diseases. Our cells therefore activate and send “repair-proteins”...
The Fraunhofer IWS Dresden and Technische Universität Dresden inaugurated their jointly operated Center for Additive Manufacturing Dresden (AMCD) with a festive ceremony on February 7, 2017. Scientists from various disciplines perform research on materials, additive manufacturing processes and innovative technologies, which build up components in a layer by layer process. This technology opens up new horizons for component design and combinations of functions. For example during fabrication, electrical conductors and sensors are already able to be additively manufactured into components. They provide information about stress conditions of a product during operation.
The 3D-printing technology, or additive manufacturing as it is often called, has long made the step out of scientific research laboratories into industrial...
Nature does amazing things with limited design materials. Grass, for example, can support its own weight, resist strong wind loads, and recover after being...
Nanometer-scale magnetic perforated grids could create new possibilities for computing. Together with international colleagues, scientists from the Helmholtz Zentrum Dresden-Rossendorf (HZDR) have shown how a cobalt grid can be reliably programmed at room temperature. In addition they discovered that for every hole ("antidot") three magnetic states can be configured. The results have been published in the journal "Scientific Reports".
Physicist Dr. Rantej Bali from the HZDR, together with scientists from Singapore and Australia, designed a special grid structure in a thin layer of cobalt in...
13.02.2017 | Event News
10.02.2017 | Event News
09.02.2017 | Event News
23.02.2017 | Physics and Astronomy
23.02.2017 | Earth Sciences
23.02.2017 | Life Sciences